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Hydration is important to all individuals including occupational workers who complete physical activity in the heat. Current best practice guidelines suggest drinking a cup of water every 15-20 minutes during activity in a hot environment, but research shows this may not be ideal for best maintaining hydration. The goal of this study is to determine if larger, more frequent water boluses better maintain hydration than smaller, less frequent water boluses during moderate intensity physical activity in the heat.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Current Best Practice - 237 mL water bolus | Active Comparator |
| |
| New Intervention - 500 mL water bolus | Experimental |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Hydration protocol - 237 mL water bolus | Other | Subjects consume 237 mL of water every 20 minutes during 2 hours of high intensity work in the heat. |
|
| Measure | Description | Time Frame |
|---|---|---|
| Percent body mass loss | Percent body mass loss after water intake | 2 hours |
| Core temperature | Core temperature after water intake | 2 hours |
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Inclusion Criteria:
Exclusion Criteria:
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| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Center for Research and Exercise in Special Environments | Buffalo | New York | 14214 | United States |
IPD data can be provided upon written request.
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| ID | Term |
|---|---|
| D003681 | Dehydration |
| D000084462 | Hyperthermia |
| ID | Term |
|---|---|
| D014883 | Water-Electrolyte Imbalance |
| D008659 | Metabolic Diseases |
| D009750 | Nutritional and Metabolic Diseases |
| D010335 | Pathologic Processes |
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Randomized, counterbalanced, crossover study
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| Hydration protocol - 500 mL water bolus | Other | Subjects consume 500 mL of water every 40 minutes during 2 hours of high intensity work in the heat. |
|
| D013568 | Pathological Conditions, Signs and Symptoms |
| D001832 | Body Temperature Changes |
| D012816 | Signs and Symptoms |
| D018882 | Heat Stress Disorders |
| D014947 | Wounds and Injuries |